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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment">// (BSD License: http://www.opensource.org/licenses/bsd-license)</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment">// Copyright (c) 2011, Joe Walnes and contributors</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment">// All rights reserved.</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  <em class="jxr_comment">// Redistribution and use in source and binary forms, with or</em>
<a class="jxr_linenumber" name="22" href="#22">22</a>  <em class="jxr_comment">// without modification, are permitted provided that the</em>
<a class="jxr_linenumber" name="23" href="#23">23</a>  <em class="jxr_comment">// following conditions are met:</em>
<a class="jxr_linenumber" name="24" href="#24">24</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="25" href="#25">25</a>  <em class="jxr_comment">// * Redistributions of source code must retain the above</em>
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_comment">// copyright notice, this list of conditions and the</em>
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_comment">// following disclaimer.</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="29" href="#29">29</a>  <em class="jxr_comment">// * Redistributions in binary form must reproduce the above</em>
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_comment">// copyright notice, this list of conditions and the</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  <em class="jxr_comment">// following disclaimer in the documentation and/or other</em>
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_comment">// materials provided with the distribution.</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_comment">// * Neither the name of the Webbit nor the names of</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_comment">// its contributors may be used to endorse or promote products</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_comment">// derived from this software without specific prior written</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_comment">// permission.</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_comment">// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_comment">// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_comment">// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_comment">// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_comment">// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_comment">// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_comment">// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_comment">// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_comment">// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_comment">// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_comment">// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_comment">// POSSIBILITY OF SUCH DAMAGE.</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  
<a class="jxr_linenumber" name="54" href="#54">54</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.http.websocketx;
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="58" href="#58">58</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="59" href="#59">59</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.frame.TooLongFrameException;
<a class="jxr_linenumber" name="61" href="#61">61</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
<a class="jxr_linenumber" name="62" href="#62">62</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLogger;
<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLoggerFactory;
<a class="jxr_linenumber" name="64" href="#64">64</a>  
<a class="jxr_linenumber" name="65" href="#65">65</a>  <strong class="jxr_keyword">import</strong> java.nio.ByteBuffer;
<a class="jxr_linenumber" name="66" href="#66">66</a>  
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * Encodes a web socket frame into wire protocol version 8 format. This code was forked from &lt;a</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> * href="https://github.com/joewalnes/webbit"&gt;webbit&lt;/a&gt; and modified.</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> * &lt;/p&gt;</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> WebSocket08FrameEncoder <strong class="jxr_keyword">extends</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/oneone/OneToOneEncoder.html">OneToOneEncoder</a> {
<a class="jxr_linenumber" name="74" href="#74">74</a>  
<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../../org/jboss/netty/logging/InternalLogger.html">InternalLogger</a> logger = InternalLoggerFactory.getInstance(WebSocket08FrameEncoder.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="76" href="#76">76</a>  
<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_CONT = 0x0;
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_TEXT = 0x1;
<a class="jxr_linenumber" name="79" href="#79">79</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_BINARY = 0x2;
<a class="jxr_linenumber" name="80" href="#80">80</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_CLOSE = 0x8;
<a class="jxr_linenumber" name="81" href="#81">81</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_PING = 0x9;
<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte OPCODE_PONG = 0xA;
<a class="jxr_linenumber" name="83" href="#83">83</a>  
<a class="jxr_linenumber" name="84" href="#84">84</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> maskPayload;
<a class="jxr_linenumber" name="85" href="#85">85</a>  
<a class="jxr_linenumber" name="86" href="#86">86</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     * Constructor</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     * @param maskPayload</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     *            Web socket clients must set this to true to mask payload. Server implementations must set this to</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     *            false.</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">public</strong> WebSocket08FrameEncoder(<strong class="jxr_keyword">boolean</strong> maskPayload) {
<a class="jxr_linenumber" name="94" href="#94">94</a>          <strong class="jxr_keyword">this</strong>.maskPayload = maskPayload;
<a class="jxr_linenumber" name="95" href="#95">95</a>      }
<a class="jxr_linenumber" name="96" href="#96">96</a>  
<a class="jxr_linenumber" name="97" href="#97">97</a>      @Override
<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">protected</strong> Object encode(<a href="../../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, Object msg) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="99" href="#99">99</a>  
<a class="jxr_linenumber" name="100" href="#100">100</a>         byte[] mask;
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a>         <strong class="jxr_keyword">if</strong> (msg instanceof WebSocketFrame) {
<a class="jxr_linenumber" name="103" href="#103">103</a>             <a href="../../../../../../../org/jboss/netty/handler/codec/http/websocketx/WebSocketFrame.html">WebSocketFrame</a> frame = (WebSocketFrame) msg;
<a class="jxr_linenumber" name="104" href="#104">104</a>             <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data = frame.getBinaryData();
<a class="jxr_linenumber" name="105" href="#105">105</a>             <strong class="jxr_keyword">if</strong> (data == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="106" href="#106">106</a>                 data = ChannelBuffers.EMPTY_BUFFER;
<a class="jxr_linenumber" name="107" href="#107">107</a>             }
<a class="jxr_linenumber" name="108" href="#108">108</a> 
<a class="jxr_linenumber" name="109" href="#109">109</a>             byte opcode;
<a class="jxr_linenumber" name="110" href="#110">110</a>             <strong class="jxr_keyword">if</strong> (frame instanceof TextWebSocketFrame) {
<a class="jxr_linenumber" name="111" href="#111">111</a>                 opcode = OPCODE_TEXT;
<a class="jxr_linenumber" name="112" href="#112">112</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frame instanceof PingWebSocketFrame) {
<a class="jxr_linenumber" name="113" href="#113">113</a>                 opcode = OPCODE_PING;
<a class="jxr_linenumber" name="114" href="#114">114</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frame instanceof PongWebSocketFrame) {
<a class="jxr_linenumber" name="115" href="#115">115</a>                 opcode = OPCODE_PONG;
<a class="jxr_linenumber" name="116" href="#116">116</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frame instanceof CloseWebSocketFrame) {
<a class="jxr_linenumber" name="117" href="#117">117</a>                 opcode = OPCODE_CLOSE;
<a class="jxr_linenumber" name="118" href="#118">118</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frame instanceof BinaryWebSocketFrame) {
<a class="jxr_linenumber" name="119" href="#119">119</a>                 opcode = OPCODE_BINARY;
<a class="jxr_linenumber" name="120" href="#120">120</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (frame instanceof ContinuationWebSocketFrame) {
<a class="jxr_linenumber" name="121" href="#121">121</a>                 opcode = OPCODE_CONT;
<a class="jxr_linenumber" name="122" href="#122">122</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="123" href="#123">123</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnsupportedOperationException(<span class="jxr_string">"Cannot encode frame of type: "</span> + frame.getClass().getName());
<a class="jxr_linenumber" name="124" href="#124">124</a>             }
<a class="jxr_linenumber" name="125" href="#125">125</a> 
<a class="jxr_linenumber" name="126" href="#126">126</a>             <strong class="jxr_keyword">int</strong> length = data.readableBytes();
<a class="jxr_linenumber" name="127" href="#127">127</a> 
<a class="jxr_linenumber" name="128" href="#128">128</a>             <strong class="jxr_keyword">if</strong> (logger.isDebugEnabled()) {
<a class="jxr_linenumber" name="129" href="#129">129</a>                 logger.debug(<span class="jxr_string">"Encoding WebSocket Frame opCode="</span> + opcode + <span class="jxr_string">" length="</span> + length);
<a class="jxr_linenumber" name="130" href="#130">130</a>             }
<a class="jxr_linenumber" name="131" href="#131">131</a> 
<a class="jxr_linenumber" name="132" href="#132">132</a>             <strong class="jxr_keyword">int</strong> b0 = 0;
<a class="jxr_linenumber" name="133" href="#133">133</a>             <strong class="jxr_keyword">if</strong> (frame.isFinalFragment()) {
<a class="jxr_linenumber" name="134" href="#134">134</a>                 b0 |= 1 &lt;&lt; 7;
<a class="jxr_linenumber" name="135" href="#135">135</a>             }
<a class="jxr_linenumber" name="136" href="#136">136</a>             b0 |= frame.getRsv() % 8 &lt;&lt; 4;
<a class="jxr_linenumber" name="137" href="#137">137</a>             b0 |= opcode % 128;
<a class="jxr_linenumber" name="138" href="#138">138</a> 
<a class="jxr_linenumber" name="139" href="#139">139</a>             <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> header;
<a class="jxr_linenumber" name="140" href="#140">140</a>             <a href="../../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> body;
<a class="jxr_linenumber" name="141" href="#141">141</a> 
<a class="jxr_linenumber" name="142" href="#142">142</a>             <strong class="jxr_keyword">if</strong> (opcode == OPCODE_PING &amp;&amp; length &gt; 125) {
<a class="jxr_linenumber" name="143" href="#143">143</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../../org/jboss/netty/handler/codec/frame/TooLongFrameException.html">TooLongFrameException</a>(<span class="jxr_string">"invalid payload for PING (payload length must be &lt;= 125, was "</span>
<a class="jxr_linenumber" name="144" href="#144">144</a>                         + length);
<a class="jxr_linenumber" name="145" href="#145">145</a>             }
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>             <strong class="jxr_keyword">int</strong> maskLength = maskPayload ? 4 : 0;
<a class="jxr_linenumber" name="148" href="#148">148</a>             <strong class="jxr_keyword">if</strong> (length &lt;= 125) {
<a class="jxr_linenumber" name="149" href="#149">149</a>                 header = ChannelBuffers.buffer(2 + maskLength);
<a class="jxr_linenumber" name="150" href="#150">150</a>                 header.writeByte(b0);
<a class="jxr_linenumber" name="151" href="#151">151</a>                 byte b = (byte) (maskPayload ? 0x80 | (byte) length : (byte) length);
<a class="jxr_linenumber" name="152" href="#152">152</a>                 header.writeByte(b);
<a class="jxr_linenumber" name="153" href="#153">153</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (length &lt;= 0xFFFF) {
<a class="jxr_linenumber" name="154" href="#154">154</a>                 header = ChannelBuffers.buffer(4 + maskLength);
<a class="jxr_linenumber" name="155" href="#155">155</a>                 header.writeByte(b0);
<a class="jxr_linenumber" name="156" href="#156">156</a>                 header.writeByte(maskPayload ? 0xFE : 126);
<a class="jxr_linenumber" name="157" href="#157">157</a>                 header.writeByte(length &gt;&gt;&gt; 8 &amp; 0xFF);
<a class="jxr_linenumber" name="158" href="#158">158</a>                 header.writeByte(length &amp; 0xFF);
<a class="jxr_linenumber" name="159" href="#159">159</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="160" href="#160">160</a>                 header = ChannelBuffers.buffer(10 + maskLength);
<a class="jxr_linenumber" name="161" href="#161">161</a>                 header.writeByte(b0);
<a class="jxr_linenumber" name="162" href="#162">162</a>                 header.writeByte(maskPayload ? 0xFF : 127);
<a class="jxr_linenumber" name="163" href="#163">163</a>                 header.writeLong(length);
<a class="jxr_linenumber" name="164" href="#164">164</a>             }
<a class="jxr_linenumber" name="165" href="#165">165</a> 
<a class="jxr_linenumber" name="166" href="#166">166</a>             <em class="jxr_comment">// Write payload</em>
<a class="jxr_linenumber" name="167" href="#167">167</a>             <strong class="jxr_keyword">if</strong> (maskPayload) {
<a class="jxr_linenumber" name="168" href="#168">168</a>                 Integer random = (<strong class="jxr_keyword">int</strong>) (Math.random() * Integer.MAX_VALUE);
<a class="jxr_linenumber" name="169" href="#169">169</a>                 mask = ByteBuffer.allocate(4).putInt(random).array();
<a class="jxr_linenumber" name="170" href="#170">170</a>                 header.writeBytes(mask);
<a class="jxr_linenumber" name="171" href="#171">171</a> 
<a class="jxr_linenumber" name="172" href="#172">172</a>                 body = ChannelBuffers.buffer(length);
<a class="jxr_linenumber" name="173" href="#173">173</a>                 <strong class="jxr_keyword">int</strong> counter = 0;
<a class="jxr_linenumber" name="174" href="#174">174</a>                 <strong class="jxr_keyword">while</strong> (data.readableBytes() &gt; 0) {
<a class="jxr_linenumber" name="175" href="#175">175</a>                     byte byteData = data.readByte();
<a class="jxr_linenumber" name="176" href="#176">176</a>                     body.writeByte(byteData ^ mask[counter++ % 4]);
<a class="jxr_linenumber" name="177" href="#177">177</a>                 }
<a class="jxr_linenumber" name="178" href="#178">178</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="179" href="#179">179</a>                 body = data;
<a class="jxr_linenumber" name="180" href="#180">180</a>             }
<a class="jxr_linenumber" name="181" href="#181">181</a>             <strong class="jxr_keyword">return</strong> ChannelBuffers.wrappedBuffer(header, body);
<a class="jxr_linenumber" name="182" href="#182">182</a>         }
<a class="jxr_linenumber" name="183" href="#183">183</a> 
<a class="jxr_linenumber" name="184" href="#184">184</a>         <em class="jxr_comment">// If not websocket, then just return the message</em>
<a class="jxr_linenumber" name="185" href="#185">185</a>         <strong class="jxr_keyword">return</strong> msg;
<a class="jxr_linenumber" name="186" href="#186">186</a>     }
<a class="jxr_linenumber" name="187" href="#187">187</a> 
<a class="jxr_linenumber" name="188" href="#188">188</a> }
</pre>
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